I know it's been on for a few years, but I didn't see it for the first time until recently. My wife found it on Live TV (she does that every once in a while), and we've been watching it ever since.
I always figured it was a "Cops" sort of thing--get ratings by dragging out the worst in society and allowing the rest of us to feel better about ourselves. I am shocked at how Dog is completely different than that. Somehow they always seem to highlight the good in people--even the fugitives they are hunting down. I look forward to seeing it because the show is always so uplifting--while still being kinda "edgy".